系统环境为centos7.9，快照恢复后，ifconfig不显示配置的静态IP，查看onboot是否配置yes
[root@anhui ~]# ifconfig lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 169 bytes 19024 (18.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 169 bytes 19024 (18.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether 52:54:00:1e:3e:41 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
重启网络后，提示查看网络状态
[root@anhui ~]# service network restart Restarting network (via systemctl): Job for network.service failed because the control process exited with error code. See "systemctl status network.service" and "journalctl -xe" for details. [FAILED]
[root@anhui ~]# systemctl status network.service ● network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network; bad; vendor preset: disabled) Active: failed (Result: exit-code) since Mon 2022-09-19 15:39:59 CST; 11s ago Docs: man:systemd-sysv-generator(8) Process: 73871 ExecStop=/etc/rc.d/init.d/network stop (code=exited, status=0/SUCCESS) Process: 74879 ExecStart=/etc/rc.d/init.d/network start (code=exited, status=1/FAILURE) Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui network[74879]: RTNETLINK answers: File exists Sep 19 15:39:59 anhui systemd[1]: network.service: control process exited, ...=1 Sep 19 15:39:59 anhui systemd[1]: Failed to start LSB: Bring up/down networking. Sep 19 15:39:59 anhui systemd[1]: Unit network.service entered failed state. Sep 19 15:39:59 anhui systemd[1]: network.service failed. Hint: Some lines were ellipsized, use -l to show in full.
解决方法
[root@anhui ~]# systemctl stop NetworkManager [root@anhui ~]# systemctl restart network
直接禁用NetworkManager，centos有两个网络服务，network和NetworkManager，两者存在一个即可
[root@anhui ~]# systemctl disable NetworkManager
Removed symlink /etc/systemd/system/multi-user.target.wants/NetworkManager.service.
Removed symlink /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service.
Removed symlink /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service.
[root@anhui ~]# ifconfig ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.56.132 netmask 255.255.255.0 broadcast 192.168.56.255 inet6 fe80::20c:29ff:fe56:fad4 prefixlen 64 scopeid 0x20<link> ether 00:0c:29:56:fa:d4 txqueuelen 1000 (Ethernet) RX packets 5025196 bytes 6992327681 (6.5 GiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 759594 bytes 930698578 (887.5 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 1000 (Local Loopback) RX packets 169 bytes 19024 (18.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 169 bytes 19024 (18.5 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
